| Subject | English | Thesaurus |
| abbr., textile | ACH-Index | arm girth, chest depth, hip width index |
| abbr. | Bond Mill Work Index | Bond WI (Alexey Lebedev) |
| abbr., goldmin. | Bond Mill Work Index | BWI (MichaelBurov) |
| abbr., goldmin. | Bond Work Index | BWI (MichaelBurov) |
| med. | Charlson Comorbidity Index | CCI (bigmaxus) |
| abbr., textile | F-index | fuzz index |
| abbr., f.trade. | Hardgrove index | Hardgrove grindability index |
| econ. | House Price Index | The House Price Index (HPI) is a broad measure of the movement of single-family property prices in the United States. (investopedia.com A.Rezvov) |
| metrol. | index mark | Any of the major or minor index marks on an instrument scale |
| ed., abbr. | Reading Every Index | REI |
| ed., abbr. | Reading Room Index | RRI |
| ocean., abbr. | Water Vapor Transport Index | WVTI |
| busin., abbr. | Work Environment Quality Index | WEQI |